Dec 27, 2012 12:00am PST
. >> reporter: though no one knows the diagnosis of the perpetrator of the shootings in newtown, the killings have raised once again the issue of forcing the mentally ill into treatment. >> warner: as congress comes back to washington to resume fiscal cliff negotiations, we ask, what happens if they don't reach a deal? >> ifill: we talk with a representative of egypt's muslim brotherhood about the new brotherhood-backed constitution signed into law today. >> warner: and we have another of our conversations with retiring members of congress. paul solman sat down with the always outspoken massachusetts democrat barney frank. >> the notion that people would not go along with an important public policy because i hurt their feelings, i don't think that's true. >> ifill: that's all ahead on tonight's "newshour." >> major funding for the pbs newshour has been provided by: >> and with the ongoing support of these institutions and foundations. and... >> this program was made possible by the corporation for public broadcasting. and by contributions to your pbs station from viewers like you. thank you.